Physical therapy, informally (5)
I believe the answer is:
rehab
'physical therapy informally' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rehab that I've seen before include "Treatment for addicts (abbrev.)" , "Treatment centre (abbrev.)" , "Restoration to health after, eg, addiction (colloq.)" , "convalescent home?" , "remedial treatment" .)